Pantograph-machine.



W. H. HOPE.

PANTOGRAPH MACHINE. APPLICATION FILED 0U. 31. I914.

Patented Mar. 13, 1917.

3 SHEETS-SHEET 1.

W. H. HOPE.

PANTOGRAPH MACHINE.

APPLICATION man OCT-31.1914.

1,219,310. 1 Patented Mal-13,1917.

3 SHEETS-SHEET 2.

Ila/II W. H. HOPE.

I PANTOGRAPH MACHINE. APPLICATION FILED OCT. 31. 19M.

1 ,21 9,31 0. Patented Mar. 13, 1.917.

3 SHEETS-SHEET 3.

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25 clency and ease of action of the means for iii WILLIAM H. HOPE, OF PROVIDENCE, BI-IODE ISLAND.

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Specification of Letters Patent.

Eatentedliiar. 13, 51917.

Application filed flctobel 31, 1914. Serial No. 369,641.

To all whom it may concern:

Be it known that I, TVILLIAM H. Horn, a citizen of the United States, residing'at Providence, in the county of Providence and State of Rhode Island, have invented a new and useful Improvement in Pantograph-Machines, of which the following is a specification.

This invention relates to certain new and useful improvements in pantograph 'machines, and the primary object thereof is to provide a machine for die or hub cutting in which novel and improved means is provided for effecting action of one or a series of cutters on an object or objects which is to be reduced in size from a large model, which cutter or cutters are c0ntrolled by a sin le stylus which operates in connection with the large model.

A further object of the invention is to provide means for enabling the roughing up operation to be more expeditiously performed.

Still further objects of the invention are to generallyimprove and increase the eflioperating the cutters from the stylus so as to cause the dies or hubs to be cut on a reduced scale as compared with the model which controls the stylus movement.

In the drawings Figure 1 is a front elevation of the machine, partly broken away.

Fig. 2 is an end elevation partly in section.

Fig. 3 is a fragmentary detail view on an enlarged scale, parts being shown in section, and

Fig. l is a side elevation of a form of grounding device used in roughing out the die.

In proceeding in accordance with the present invention a table 1 is employed upon which the model 2 is placed. A carriage 4: carries wheels 4 which operate on. track 4 of a lower carriage 5 which has wheels 5" that run on track 6 secured to the frame A. I A frame 3 is secured to the carriage e and has a'segment gear 5 and a pinion or gear 6 connected to the segment, which pinion meshes withthe rack 7, while the pinion 8 meshes with the teeth of segment 5 and with a rack 9 carrying the stylus 10. The rack 7 extends upwardly and has its top end of tubular formation so as to adjustably receive a rod 1] to which latter table 12 on which is shown the work 12.

Therefore, an in and out movement of the stylus 10 would swing lever 41 to effect partial rotation of the central mechanism and, through lever 1 i, slide carriage 12 to cause an in and out movement of the work carrying table, the carriage supporting the stylus being moved inwardly and outwardly, and the ball end of lever sliding in the groove 46 of carriage 4 during such movement.

Located above the upper table is a bar 13 which extends the entire length of the machine and is supported by rollers 47 for sidewise or transverse movement relative to the machine. One or more guide ways 14 are secured to the bar 13, the number depending upon the number of hubs or dies to be cut. A rotatable gear 15 is driven by a pulley 16 through belt 17 from the pulley 18 and power pulley 19. An arm 20 for each guide way 141 is pivotally secured at 21 to a rod 22 which extends the entire length of the machine and is rigidly supported at its ends. The arms 20 extend outwardly and have plates 22 connected to their outer ends, which plates contact with the bar 11 as shown more particularly in Fig. 3. A fitting-23 is secured central of the length of each arm 20 which fitting supports a rod 23, each rod in turn being connected to a vertical slide 24. Each of the slides 24 has a bearing in which the shafts 25 are journaled, the shafts carrying cutting tools 26 on their lower ends and having gears 27 aflixed to their upper ends, which gears 27 mesh with the gears 15. By reference to Fig. 1 of the drawings, it will be seen that the machine is capable of cutting seven dies or hubs in" one operation, and that each of the cutting tools 26 has operating mechanism similar to mechanism just described, so that all of the cutting mechanisms will be operated in unison.

Referring to Fig. 4 of the drawings, it will be seen that a structure is provided for the roughingv up operation which includes utilized and consists of the lever 45 connected through bearing 48 with the graduated adjusting table 49. A partial rotation is imparted to this table on sidewise movement of carriage 4, and by reason of the ball 50 operating in the groove of lever 51, which latter is connected to the tool carrying bar 13, proportionately similar movement will be simultaneously imparted to said bar. It will be readily seen that after the roughing up process, any particular part of the die or hub can be retouched or worked over by moving the stylus to that portion of the model and by reason of its connection with the cutter through the pantographic carriages.

In operation the stylus 10 upon being moved upwardly will rotate pinion 8 counter-clockwise, thereby moving segment 5 and connected gear 6 clockwise, thereby raising rack bar 7 a distance proportional to the raise which has been given rack bar 9 to which latter the stylus 10 is connected. Downward movement of the stylus 10 will effect corresponding movement of the rack 7 in a similar but with a slower movement of the parts. Since the rack bar 7 is in connection with the bar 11 and since the latter is common to all of the plates 22 of the arms 20, it will be seen that the arms 20 will be given movement corresponding to the movements of the rack 7 thereby caus ing the cutters 26 to be raised or lowered with the stylus 10, and since the cutters 26 are being constantly rotated by the belt 17 all of the objects 12 will be cut in unison.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. In a pantograph machine, in combination with a pair of superposed carriages and means whereby the same are operated in unison, a pivoted arm, a gear carried by the arm, means to drive the gear, a cutter, a gear connected to the cutter and meshed with the first named gear, a plate depending from the arm, a bar upon which the plate rests, a rack, an adjustable connection between the rack and the bar, a frame connected to the lower carriage, a gear meshed with the rack and borne by the frame, a segment shaped rack connected to the gear,

a pinion meshed with the rack of the segment, and a rack on the frame meshed with the pinion and carrying a stylus.

2. In a pantograph machine, a cutter, means for moving the cutter including a rack, a stylus, a rack connected with the stylus, a pinion meshing with one of the racks, a second pinion meshing with the other rack, and a segmental gear relatively fixed to one pinion and meshing with the other pinion. I

3. .In combination with the carriages and stylus of a pantograph machine, a cutter arranged to operate on work held on one of the carriages, means movably connecting the carriages whereby movement of one carriage will movethe other carriage, a pivotal arm actuating the cutter, a slide member connected to the arm and supporting the cutter, said stylus being mounted on the other of said carriages, a rack connected to the stylus, and gearing mechanism connecting the arm with the rack whereby the stylus and the cutter will be raised or lowered in unison.

4. In a pantograph machine, a plurality of pivoted arms, a cutter carried by each arm for movement therewith, a slidable rack bar, means operable by the latter to move the arms in unison, a stylus, and means operatively connecting the stylus to the rack bar.

5. In combination with the carriages, of I a pantograph machine, a stylus carried by one carriage, a series of cutters arranged to operate on work supported bythe other carriage, means to drive the cutters, a pivoted arm for supporting each cutter, a bar common to all of the arms for supporting the free ends of the same, means connected to the bar for operating the same, and means operated by the up and down movements of the stylus for effecting up and down movement of the last named means.

6. In combination with the carriages and stylus of a pantograph machine, a series of cutters arranged to operate on work held by one of the carriages, the stylus being movably mounted on the other carriage, a pivoted arm supporting each cutter, means on which the pivoted arms rest to cause up and down movement of the cutters in unison, and means connected to the stylus and D cutter, and means for moving one of the carriages upon movement of the other carriage.

8. In combination, a carriage for holding work, a cutter for operating upon the work on the carriage and having vertical movement relative thereto, means for driving the cutter including relatively slidable gears one of which is fixedly related to the cutter, a second carriage, a vertically movable stylus mounted on the latter, means for transmitting horizontal movement from one carriage to the other, and means for transmitting vertical movement of the stylus to the cutter.

9. In combination with an upper and a lower carriage, and means to cause same to operate in unison, a series of arms pivoted so as to have vertically movable free ends, a horizontal bar common to all of said arms and underlying same so as to support the arms and effect up and down movement thereof in unison, a cutter for each arm, means to support the cutters from the arms, means to drive all of the cutters in unison,

avertical member depending from said bar and having connection with the lower carriage, a stylus, and means to connect the stylus to said member whereby the stylus movements are communicated to said member and therethrough to the arms.

10. In combination with an upper carriage, a cutter arranged to operate upon work held by the carriage, a guide, a drive member on the guide, a vertically movable slide in the guide, said cutter being rotatably supported by the slide, means having slidable engagement with the drive member and borne by the slide to rotate the cutter,

a lower carriage, a stylus carried on the latter, and means between the stylus and slide whereby vertical movements of the stylus are communicated to the slide.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

XVILLIAM H. HOPE.

Witnesses:

ADA E. HAGERTY, J. A. MILLER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. G. 

